"Word templates led people to use the same formatting in communications, and eventually, this has become instantiated as a norm," says Gloria Mark, a professor of informatics at the University of California, Irvine, where she studies human-computer interaction. If you work in finance, there's a specific way reports are expected to be laid out. Letters follow a set pattern, memos are largely formatted in the same way. "Users know where to find information in these standardised documents; they don’t need to spend time trying to find what they need."

Correct me if I'm wrong, but at least Germany seems to have standards for this since 1949, so I doubt this can be contributed to Microsoft (alone).